Rubber crawler



FIG. 1 is a rear perspective view of a rubber crawler showing my new design.

FIG. 2 is a rear elevation view thereof.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a left side elevation view thereof.

The portion of the article shown in broken lines is for illustrative purposes only and forms no part of the claimed design. The dashed-dotted-lines represent the boundaries of the claimed design and form no part thereof. 

The ornamental design for a rubber crawler, as shown and described. 